<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>合并单元格</title>
</head>
<body>
<table border="1">
    <tr>
        <th rowspan="2">学号</th>
        <th rowspan="2">姓名</th>
        <th colspan="3">成绩</th>
        <th rowspan="2">操作</th>
    </tr>
    <tr>
        <th>Java</th>
        <th>Web</th>
        <th>MySQL</th>
    </tr>
    <tr>
        <td>1</td>
        <td>admin</td>
        <td>100</td>
        <td>80</td>
        <td>90</td>
        <td>
            <a href="">修改</a>
            <a href="">删除</a>
        </td>
    </tr>
    <tr>
        <td>2</td>
        <td>jack</td>
        <td>70</td>
        <td>90</td>
        <td>90</td>
        <td>
            <a href="">修改</a>
            <a href="">删除</a>
        </td>
    </tr>
    <tr>
        <td>3</td>
        <td>tom</td>
        <td>90</td>
        <td>80</td>
        <td>90</td>
        <td>
            <a href="">修改</a>
            <a href="">删除</a>
        </td>
    </tr>
    <tr>
        <td>4</td>
        <td>alex</td>
        <td>60</td>
        <td>50</td>
        <td>70</td>
        <td>
            <a href="">修改</a>
            <a href="">删除</a>
        </td>
    </tr>
</table>
</body>
</html>